{{{1}}}

This template belongs to Meta/Wikipedia's Category:MSIE font fix templates, a collection of fixes for browsers (mainly Microsoft's) which are not fully HTML compliant.
A usage example
The first two lines are switch statements indicating how many white space characters the user has asked for. The 'XYZ' is so you can see the effect.
|2= {{unicode| }}XYZ 
|3=  {{unicode| }}XYZ
|2= {{unicode| }}XYZ 
|3=  {{unicode| }}XYZ